Long-Range Domain Wall Tension in Pt/Co/Pt Films with Perpendicular Magnetic Anisotropy
- Long-Range Domain Wall Tension in Pt/Co/Pt Films with Perpendicular Magnetic Anisotropy
- 문경웅; 이재철; 이숭근; 이강수; 신경호; 최석봉
- Issue Date
- Applied physics express.
- VOL 4, NO 4, 043004-1-043004-3
- We report an experimental detection of a long-range tension effect on magnetic domain walls in Pt/Co/Pt films. Such a tension effect is observed
from circular domains expanding (or shrinking) under a constant applied magnetic field. Interestingly, the domain propagation speed varies with
respect to the domain radius. Converting the speed variation to a magnetic field via the creep scaling, it is revealed that there exists an effective
field inversely proportional to the radius, in accordance with the domain wall tension and the magnetostatic dipolar interaction. The sizeable
tension effect subsists over 20 m, providing a way to directly determine the wall energy density.
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